Highwood only sells a single profile. It'll work, but it's not correct. I bought about 30 feet and did all of my windows, but the rears especially don't seal properly. Try Mr. Fiat - Alfetta GTV - Alfa Romeo - Italian Cars
If you write he will tell you exactly what you need.
It's weirdly complicated, the seals for the Alfetta. I think there are at least 5 or 6 distinct profiles for the entire car. If you want to do it "the right way" you need to contact Mr. Fiat, and be prepared to spend at least $1,000.
rowdy, chairmankaga, thank you both for your replies. I checked the Highwood Alfa website and their prices seem really good (although shipping to California will need to be taken into account). I will also contact Mr. Fiat to see if he has a perfect replacement. I really only need the two front window channel rubber seals in the photo above, all the other ones are really good, so I hope I will not need to be prepared to spend $1000 on them
That channel was one of the easiest ones to find a replacement for. I just took it down to a local shop that specialises in weather stripping and found a pretty close match. It wasn't 100% the same as the original but it worked fine. You most probably can find something to replace it at a weather stripping shop in your area.
Highwood Alfa seems to have the same thing (Seals Number 8134 Window channel felt) for 6 GBP per meter (13 meters required per car), which comes out to a totol of about $117 plus shipping (and customs).
TPAlfa that's probably the cheapest way to go. I hope to find a shop who specializes in weather stripping in my area. I live in the SF Bay Area. I've searched on Yelp but all I get are shops for home weather stripping or auto window services (for tinting or window replacement). I will try to go to one of these auto window services shops and see if they sell weather stripping as well. How did you find yours? If you have a name and/or product number for the one you used maybe I can find the same online and order it through an online retailer. If you have this information, or can procure it, I would appreciate it. Thanks.
Check Steele Rubber Products. They are heavy on restoration items mainly for American cars, but this unsupported glass run channel you need is not a critical product, as long as the dimensions are close. It just guides the glass up and down and keeps it from rattling.
I bought door seals from JC Whitney. Paid $60 for enough to do both doors. It required some mitre cutting and rubber adhesive, and MAYBE it doesn't fit perfectly, but it cost 1/4 what Mr. Fiat was asking and honestly, for my beater it's good enough.
Bottom line - shop around for close-enough profiles. They're out there and there are plenty of vendors willing to help. Just get the dimensions as close as possible and don't worry about it!